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- International Astronomical Union (2)
- International Astronomical Union. Symposium (2)
- Bracewell, Ronald Newbold, 1921- (1)
- Bruhat, Georges, 1887-1945 (1)
- Flügge, Siegfried (1)
- Greenstein, Jesse L. ed (1)
- International Astronomical Union. General Assembly (1)
- International Scientific Radio Union (1)
- Oosterhoff, P. Th. (1)
- Paris Symposium on Radio Astronomy (1)
- Schatzman, Evry L. (1)